Left Supraspinatus and Subscapularis Tears
This exhibit depicts the anterior anatomy of the shoulder with full thickness tears of the supraspinatus and subscapularis tendons. Anatomical structures include: the clavicle, coracoid process, acromion process, coracoacromial ligament, supraspinatus, subscapularis, humerus, and biceps brachii. The rotator cuff consists of four major muscle tendons: the supraspinatus, the infraspinatus, the subscapularis, and the teres minor. The supraspinatus forms the superior aspect of the rotator cuff, and is most frequently subjected to tearing, particularly at its insertion site on the greater tuberosity of the humerus. The subscapularis forms the anterior portion of the rotator cuff, and helps to internally rotate the shoulder joint. Tearing of the anterosuperior rotator cuff tendons can result in shoulder pain, impaired abduction, and internal rotation weakness.